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The concentration of vacancies in niobium (Nb) at 765˚C is 9.836 x 1018 cm-3. If niobium...

The concentration of vacancies in niobium (Nb) at 765˚C is 9.836 x 1018 cm-3. If niobium has a BCC crystal structure and a lattice parameter of 0.3302 nm, calculate the energy for vacancy formation in niobium.

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